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Finding the Fourth Proportional to 85,485.44, 128,218.24 and 23,160.64

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Solution

The fourth proportional to 85,485.44, 128,218.24 and 23,160.64 is: 34,738.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,485.44 : 128,218.24 = 23,160.64 : x
  2. Step 2: Convert to fraction form
    85,485.44/128,218.24 = 23,160.64/x
  3. Step 3: Cross multiply
    85,485.44x = 128,218.24 × 23,160.64
  4. Step 4: Simplify right side
    85,485.44x = 2,969,616,498.07
  5. Step 5: Solve for x
    x = 2,969,616,498.07/85,485.44
  6. Step 6: Final answer
    x = 34,738.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.